Is it fixable? Yes, in the sense that you can rip apart everything to get to the damage and repair what’s broken. Is it worth fixing? I can’t answer that for you. What I can tell you is in 2017 I had a few things to check out and fix on my 2004 Rockw...
I used a pressure washer to wash off the peeling parts and then used an eraser wheel to remove the remaining decals and glue. Works much better than scraping/goo gone.
I used a decal eraser wheel to remove all of the decals on my TT. Mine were so brittle that i'd get a tiny bit off at a time using a heat gun and scraper. A few inches of decal was taking an hour to remove. With the wheel I removed all of the decals ...